I can PROMISE you that it gets better and you will be able to live a happy normal life. There is a thread at the top of this board that is titled "Happy Couples" it is a very uplifting read on people in relationships when one person doesn't have the virus, if you have a chance you should read it.
You have very sick people out there that do not care about others and think it is ok to make decisions for them and that is not right at all, like you mentioned though you aren't 100% if that person did give this to you or not .. that is the tricky part of this virus ya hardly ever know the when and who at times.
When you tell a new partner just make sure you feel comfortable and you feel that it is the right time. When you tell them you can't make it sound like the worst thing in the world if you do that is how they will see it. It really is just a pesky skin condition in the grand scheme of things.
I suggest you keep your stress levels down and your immune system up this will help to try and keep outbreaks to a minimum.
If there is anything else, feel free to post here if you have questions or just need to vent but please keep your head up. This is not the end of the world by any means and this DOES NOT change who you are.